v3.26.1
FAIR VALUE MEASUREMENTS - Schedule of Rollforward on Recurring Basis (Details) - Fair Value, Recurring - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Three Months Ended March 31, 2026 $ 92 $ 54
Purchases, issuances, sales and settlements:    
Issuances 4 7
Settlements (7) (1)
Transfers into Level 3 6 32
Balance at end of period 95 92
Loans Receivable    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Three Months Ended March 31, 2026 85 53
Purchases, issuances, sales and settlements:    
Issuances 0 0
Settlements 0 0
Transfers into Level 3 6 32
Balance at end of period 91 85
Interest Rate Lock Commitments    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Three Months Ended March 31, 2026 7 1
Purchases, issuances, sales and settlements:    
Issuances 4 7
Settlements (7) (1)
Transfers into Level 3 0 0
Balance at end of period $ 4 $ 7